Practice Questions

Q47.Which among the following is the strongest Bronsted base? (1) (2) (3) (4)

Q47.When enthanol is heated with conc. H2SO4, a gas is produced. The compound formed, when this gas is treated with cold dilute aqueous solution of Baeyer's reagent, is (1) Formaldehyde (2) Formic acid (3) Glycol (4) Ethanoic acid

Q48. Consider the above reaction, the compound ' A ' is (1) (2) (3) (4)

Q48.Which of the following sets are correct regarding polymer: (A) Copolymer : Buna- S (B) Condensation polymer : Nylon- 6, 6 (C) Fibres : Nylon- 6, 6 (D) Thermosetting polymer : Terylene (E) Homopolymers : Buna- N Choose the correct answer from given options below (1) (A), (B) and (C) are correct (2) (B), (C) and (D) are correct (3) (A), (C) and (E) are correct (4) (A), (B) and (D) are correct

Q48.Which of the following ketone will NOT give enamine on treatment with secondary amines? [where t - Bu is -CCH33] (1) (2) (3) (4)

Q48.The correct sequential order of the reagents for the given reaction is (1) HNO2, Fe / H+, HNO2, KI, H2O / H+ (2) HNO2, KI, Fe / H+, HNO2, H2O / warm (3) HNO2, KI, HNO2, Fe / H+, H2O / H+ (4) HNO2, Fe / H+, KI, HNO2, H2O / warm

Q48. The reaction of with bromine and KOH gives RNH2 as the end product. Which one of the following is the intermediate product formed in this reaction? (1) (2) R - NH - Br (3) R - N = C = O (4)

Q48.Which reactant will give the following alcohol on reaction with one mole of phenyl magnesium bromide (PhMgBr) followed by acidic hydrolysis? (1) CH3 –C ≡N (2) Ph −C ≡N (3) (4)

Q48.Given below are two statements, one is Assertion and other is Reason. Assertion: Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties. Reason: The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with coiled structure. In the light of the above statements, choose the correct one from the options given below (1) A Both Assertion and Reason are true and Reason (2) Both Assertion and Reason are true but Reason is is the correct explanation of Assertion not the correct explanation of Assertion. (3) Assertion is true but Reason is false. (4) Assertion is false but Reason is true.

Q48.Match List I with List II List-I (Polymer) List-II (Nature) A I Thermosetting polymer B II Fibers C III Elastomer D IV Thermoplastic polymer Choose the correct answer from the options given below (1) A −II, B −III, C −IV, D −I (2) A −III, B −II, C −IV, D −I (3) A −III, B −I, C −IV, D −II (4) A −I, B −III, C −IV, D −II JEE Main 2022 (28 Jul Shift 2) JEE Main Previous Year Paper

Q49.Statements about Enzyme Inhibitor Drugs are given below : (A) There are Competitive and Non-competitive inhibitor drugs. (B) These can bind at the active sites and allosteric sites. (C) Competitive Drugs are allosteric site blocking drugs. (D) Non-competitive Drugs are active site blocking drugs. Choose the correct answer from the options given below (1) A, D only (2) A, C only (3) A, B only (4) A, B, C only

Q49.Which of the following enhances the lathering property of soap? (1) Sodium stearate (2) Sodium carbonate (3) Sodium rosinate (4) Trisodium phosphate

Q49.A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas ′X′ with characteristic odour was released when the formed white precipitate was dissolved in dilute HCI. The anion present in the inorganic salt is: (1) I− (2) SO32− (3) S2− (4) NO−2

Q49.Match List-I with List-II List-I List-II JEE Main 2022 (27 Jul Shift 1) JEE Main Previous Year Paper A I Anti-depressant B II 550 times sweeter than cane sugar ​ C III Narcotic analgesic D IV Antiseptic Choose the correct answer from the options given below (1) A −IV, B −III, C −II, D −I (2) A −III, B −I, C −II, D −IV (3) A −III, B −IV, C −I, D −II (4) A −III, B −I, C −IV, D −II

Q49.During the qualitative analysis of salt with cation y2+ , addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are : (1) Dimethylglyoxime and Ni2+ (2) Dimethylglyoxime and Co2+ (3) Nessler's reagent and Hg2+ (4) Nessler's reagent and Ni2+

Q49.Match the following correctly (i) Zymase (a) Stomach (ii) Urease (b) Yeast (iii) Diastase (c) Malt (iv) Pepsin (d)Soyabean (1) (i)-B; (ii) D(iii)-C; (iv)-A (2) (i)-B; (ii)-A; (iii)-C; (iv)-D (3) (i)-A; (ii)-B; (iii)-C; (iv)-D (4) (i)-D; (ii)-C; (iii)-B; (iv)-A

Q49.Which of the following compound does not contain sulphur atom? (1) Histamine (2) Cimetidine (3) Saccharin (4) Ranitidine

Q49.Match List I with List II. List-I List-II (Anion) (gas evolved on reaction with dil. H2SO4 ) (A) CO2−3 (I) Colourless gas which turns lead acetate paper black. Colourless gas which turns acidified potassium dichromate (B) S2− (II) solution green. Brown fumes which turns acidified KI solution containing starch (C) SO2−3 (III) blue. gas evolved with brisk effervescence, which turns lime (D) NO−2 (IV)Colourless water milky. Choose the correct answer from the options given below (1) A −III, B −I, C −II, D −IV (2) A −II, B −I, C −IV, D −III (3) A −IV, B −I, C −III, D −II (4) A −IV, B −I, C −II, D −III

Q49. Which among the following represent reagent ' A '? JEE Main 2022 (29 Jul Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q49.Two statements in respect of drug-enzyme interaction are given below Statement I : Action of an enzyme can be blocked only when an inhibitor blocks the active site of the enzyme. Statement II : An inhibitor can form a strong covalent bond with the enzyme. In the light of the above statements. Choose the correct answer from the options given below (1) Both Statement I and Statement II are true (2) Both Statement I and Statement II are false (3) Statement I is true but Statement II is false (4) Statement I is false but Statement II is true

Q49.Match List - I with List - II. List-I List-II A I Dishwashing powder B II Toothpaste C C17H35 COO−Na+ + Na2 CO3+ Rosinate III Laundry soap D CH3 (CH2)16 COO (CH2 CH2 O)n CH2 CH2 OH IV Hair conditioner Choose the correct answer from the options given below (1) (A) −(IV), (B) −(II), (C) −(III), (D) −(I) (2) (A) −(III), (B) −(II), (C) −(IV), (D) −(I) (3) (A) −(IV), (B) −(III), (C) −(II), (D) −(I) (4) (A) −(II), (B) −(IV), (C) −(I), (D) −(II)

Q50.A sugar ' X ' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar ' X ' is (1) Aldopentose (2) Aldotetrose (3) Oxalic acid (4) Ketotetrose

Q50.Glycosidic linkage between C1 of α -glucose and C2 of β -fructose is found in (1) Maltose (2) Sucrose (3) Lactose (4) amylose Q51. 56. 0 L of nitrogen gas is mixed with excess of hydrogen gas and it is found that 20 L of ammonia gas is produced, The volume of unused nitrogen gas is found to be_____ L.

Q50.Which one of the following is a water soluble vitamin, that is not excreted easily? (1) Vitamin B2 (2) Vitamin B1 (3) Vitamin B6 (4) Vitamin B12 JEE Main 2022 (26 Jun Shift 2) JEE Main Previous Year Paper

Q50.Match List-I with List-II JEE Main 2022 (27 Jul Shift 2) JEE Main Previous Year Paper List-I List-II A Glucose + HI I Gluconic acid B Glucose + Br2 water II Glucose pentacetate C Glucose + acetic anhydride III Saccharic acid D Glucose + HNO3 IV Hexane Choose the correct answer from the options given below (1) A −IV, B −I, C −II, D −III (2) A −IV, B −III, C −II, D −I (3) A −III, B −I, C −IV, D −II (4) A −I, B −III, C −IV, D −II Q51. ​ In the above reaction, 5 g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is____ ×10−2 g